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The effects of initial void and dislocation on the onset of plasticity in copper single crystals
Hu JQ(胡剑桥)1,2; Ye X(叶璇)1; Liu XM(刘小明)1,2; Chen Z3,4
Corresponding AuthorLiu, Xiaoming(xiaomingliu@lnm.imech.ac.cn) ; Chen, Zhen(chenzh@missouri.edu)
Source PublicationJOURNAL OF APPLIED PHYSICS
2019-10-28
Volume126Issue:16Pages:10
ISSN0021-8979
AbstractBased on molecular dynamics, the effects of void and initial dislocation structure on incipient plasticity are investigated with single crystal copper samples. By introducing a void of different sizes and shapes and dislocations of different initial structures around the void in copper single crystals, we explore their effects on yielding as well as the dominated deformation mechanism. The main findings from this study are as follows: (1) for the samples with a void of the same size, the yield stress approaches to a specific value as the initial dislocation density increases; (2) for samples with a void of varying size, the yield stress becomes independent of the void size as it reaches a certain level, due to the saturation of preexisting dislocations around the void; and (3) as the strain rate increases, the effects of voids and preexisting dislocations on the yield stress become limited due to the response inertia, for which the phase transition from face-centered cubic to an amorphous phase occurs at an extremely high strain rate. Published under license by AIP Publishing.
DOI10.1063/1.5125061
Indexed BySCI ; EI
Language英语
WOS IDWOS:000504001300030
WOS KeywordPREEXISTING DISLOCATIONS ; INDUCED DEFORMATION ; MOLECULAR-DYNAMICS ; GROWTH ; NUCLEATION ; DUCTILE ; COALESCENCE ; MECHANISMS ; BEHAVIOR ; METALS
WOS Research AreaPhysics
WOS SubjectPhysics, Applied
Funding ProjectNational Natural Science Foundation of China (NNSFC)[11802310] ; Science Challenge Project[TZ2018001] ; National Natural Science Foundation of China[11772334] ; National Natural Science Foundation of China[11672301] ; Youth Innovation Promotion Association CAS[2018022] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040501]
Funding OrganizationNational Natural Science Foundation of China (NNSFC) ; Science Challenge Project ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Strategic Priority Research Program of the Chinese Academy of Sciences
Classification二类
Ranking1
ContributorLiu, Xiaoming ; Chen, Zhen
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/81271
Collection非线性力学国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China;
3.Dalian Univ Technol, State Key Lab Struct Anal Ind Equipment, Dept Engn Mech, Int Res Ctr Computat Mech, Dalian 116023, Peoples R China;
4.Univ Missouri, Dept Civil & Environm Engn, Columbia, MO 65211 USA
Recommended Citation
GB/T 7714
Hu JQ,Ye X,Liu XM,et al. The effects of initial void and dislocation on the onset of plasticity in copper single crystals[J]. JOURNAL OF APPLIED PHYSICS,2019,126(16):10.
APA 胡剑桥,叶璇,刘小明,&Chen Z.(2019).The effects of initial void and dislocation on the onset of plasticity in copper single crystals.JOURNAL OF APPLIED PHYSICS,126(16),10.
MLA 胡剑桥,et al."The effects of initial void and dislocation on the onset of plasticity in copper single crystals".JOURNAL OF APPLIED PHYSICS 126.16(2019):10.
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